1/*
2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/entity/HttpEntityWrapper.java $
3 * $Revision: 496070 $
4 * $Date: 2007-01-14 04:18:34 -0800 (Sun, 14 Jan 2007) $
5 *
6 * ====================================================================
7 * Licensed to the Apache Software Foundation (ASF) under one
8 * or more contributor license agreements.  See the NOTICE file
9 * distributed with this work for additional information
10 * regarding copyright ownership.  The ASF licenses this file
11 * to you under the Apache License, Version 2.0 (the
12 * "License"); you may not use this file except in compliance
13 * with the License.  You may obtain a copy of the License at
14 *
15 *   http://www.apache.org/licenses/LICENSE-2.0
16 *
17 * Unless required by applicable law or agreed to in writing,
18 * software distributed under the License is distributed on an
19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 * KIND, either express or implied.  See the License for the
21 * specific language governing permissions and limitations
22 * under the License.
23 * ====================================================================
24 *
25 * This software consists of voluntary contributions made by many
26 * individuals on behalf of the Apache Software Foundation.  For more
27 * information on the Apache Software Foundation, please see
28 * <http://www.apache.org/>.
29 *
30 */
31
32package org.apache.http.entity;
33
34import java.io.IOException;
35import java.io.InputStream;
36import java.io.OutputStream;
37
38import org.apache.http.Header;
39import org.apache.http.HttpEntity;
40
41/**
42 * Base class for wrapping entities.
43 * Keeps a {@link #wrappedEntity wrappedEntity} and delegates all
44 * calls to it. Implementations of wrapping entities can derive
45 * from this class and need to override only those methods that
46 * should not be delegated to the wrapped entity.
47 *
48 * @version $Revision: 496070 $
49 *
50 * @since 4.0
51 */
52public class HttpEntityWrapper implements HttpEntity {
53
54    /** The wrapped entity. */
55    protected HttpEntity wrappedEntity;
56
57    /**
58     * Creates a new entity wrapper.
59     *
60     * @param wrapped   the entity to wrap
61     */
62    public HttpEntityWrapper(HttpEntity wrapped) {
63        super();
64
65        if (wrapped == null) {
66            throw new IllegalArgumentException
67                ("wrapped entity must not be null");
68        }
69        wrappedEntity = wrapped;
70
71    } // constructor
72
73
74    public boolean isRepeatable() {
75        return wrappedEntity.isRepeatable();
76    }
77
78    public boolean isChunked() {
79        return wrappedEntity.isChunked();
80    }
81
82    public long getContentLength() {
83        return wrappedEntity.getContentLength();
84    }
85
86    public Header getContentType() {
87        return wrappedEntity.getContentType();
88    }
89
90    public Header getContentEncoding() {
91        return wrappedEntity.getContentEncoding();
92    }
93
94    public InputStream getContent()
95        throws IOException {
96        return wrappedEntity.getContent();
97    }
98
99    public void writeTo(OutputStream outstream)
100        throws IOException {
101        wrappedEntity.writeTo(outstream);
102    }
103
104    public boolean isStreaming() {
105        return wrappedEntity.isStreaming();
106    }
107
108    public void consumeContent()
109        throws IOException {
110        wrappedEntity.consumeContent();
111    }
112
113} // class HttpEntityWrapper
114